Disk-harrow sharpener.



` H. LAMMON. DISK HARROW SHARPENER. APPLIOATION rILBD I'BB.14, 1813.

Patentd Nov; 25, 1918..

Z f f H. LAMMON. DISK HARROW SHARPENER. APPLIOATION PILBD M1314; 1918.

CoLuMBIA PLANOGRAPH co., WASHINOTON, D. c.

UNITED STATES PATENT OFFICE.

HARRY LAivrMoN, or CLEVELAND, TEXAs.

DISK-I-IARROW SHARPENER.

T0 all whom it may Gomera:

Be it known that I, HARRY LAMMON, a citizen of the United States, residing at Cleveland, in the county of Liberty 'and State of Texas, have invented certain new and useful Improvements in Disk-Harrow Sharpeners, of which the following is a specification.

This invention relates to improvements in disk harrow sharpeners and particularly to the type in which a supplemental sharpener carrying frame is sustained by the main frame of a disk harrow.

The object in view is the provision of simple andefiicient means for sharpening the disk or disks of a pulverizer or disk harrow of the various sizes and type now on the market.

A further object in view is the resilient retention of the sharpening members in operative relation to a disk, and the simultaneous resilient retention of a scraper for the same disk in the appropriate relation thereto by the same resilient means as that effecting the sharpening members.

VVith these and further objects in view, as will in part hereinafter be stated and in part become apparent, the invention comprises a supplemental frame, means for sustaining the same on thetmain frame of a disk harrow, shiftable arms carried by the supplemental frame, sharpening means sustained by the arms in position for .operatively engaging the disk of a harrow, a spring engaging the arms for retaining the same in position, a scraper for the harrow, and means engaged by the spring for retaining the scraper in proper relation to the disk.

The invention comprises certain other novel constructions, combinations and arrangements of parts, as will be hereinafter specified and claimed.

In the accompanying drawing: Figure 1 is a top plan view of a disk harrow provided with an embodiment of the present invention. Fig. 2 is a Vertical section therethrough taken on the plane indicated by line 2-2 of F ig. 1. Fig. 3 is an enlarged detail plan view of the supplemental frame detached. Fig. 4: is a detail plan view of the sharpener members and connected parts, parts being broken away and seen in section and parts being seen in an inverted position with respect to the position shown in Fig. 3 and being seen on an enlarged Scale. Fig.

Specifieation of Letters Patent.

Application filed February 14, 1913.

Paten'a Nov. 25, 1913.

Serial No. 748,394.

5 is an edge view of the parts as seen in Fig. 4;, the disclosed member of the supplemental frame being shown in section. Figs. 6 and 7 are respectively cross Sections taken on the planes indicated by lines 6-6 and 7-7 of Fig. 5. Fig. 8 is a detail cross section taken on the planes indicated by line 8-8 of Fig. 4. Fig. 9 is a similar view taken on the plane indicated by line 94-9 of Fig. 4:. Fig. 10 is a horizontal section taken on the plane indicated by line 10-10 of Fig. 9.

Referring to the drawing by numerals, 1 indicates the main shaft of a disk harrow which is journaled in a frame 2 which, so far as this invention is concerned, may be of any of the ordinary or conventional types and includes a rear scraper bar 3 having the scrapers 4, 4 projecting therefrom in position for engaging the disks 5, 5, which disks are fixed to the shaft 1.

A supplemental frame 6 is disposed adjacent the disks 5 and consists of a. preferably substant-ially rect'angular loblong framing extending approximately for the length of one gang of disks 5 and is sustained by arms 7 7 extending to and, con- .nected with the shaft 1 by bearing clamps 8, S, the frame being also supported by straps 9 connected with one of the members of the frame 6 and extending to and connected with the bar 3. The rectangular framing eomprising the supplemental frame may be of tubing, or may be constructed of other suitable material but preferably has its'outermost bar 'continuous from one end of the frame to the other and surrounded by a sleeve 10 which is slidable upon the bar and adapted to'be slid longitudinally thereof from one end of the frame to the other. The sleeve 10 has an enlargement or thickened portion 11 at one side, which lportion is apertured and threaded for the reception of a set screw 12 which is passed therethroughinto engagement with the respective bar of the frame for looking the sleeve in any given adjusted position. The sleeve 10 is formed with a hollow extension or T portion 13 projecting toward 'the inner longitudinal bar of the supplemental frame, and sharpener arms 111 have their outer ends pivoted, as at 15, 15 within the extension 13. The arms 14: are free to swing upon their pivots 15 toward and away from each other, but to prevent excessive separation a bolt 16 is passed through both of said arms and springs 17 and 18 surround the end portions of the bolt 16 outside of the arms between the head or nut thereof, as the case may be, and the respective arm 14. The bolt 16 is provided with a head at one end and engaged by a nut at the other. Thus the springs 17 and 18 press the arms 14 toward each other and ret-ain the same in contact until separated by the eXertion of force thereon greater than the resistance of the Springs 17 and 18.

The bolt 16 is disposed adjacent the free ends of the arms 14, and one of said arms is bent laterally atV that portion beyond the bolt so as to prodce an intervening space for accommodating the edge of a disk 5, the ben't portion being apertured, as at 19, for receiving a sharpening tool 20 which is beveled for forming a cutting edge disposed within the space between the arms 14 for engaging the interposed portion of the disk being operated upon. A set screw 21 is threaded through the material of the arm 14 which carries the cutter 20 in position for engaging the said cutter laterally for firmly clamping and looking the cutter in a given position. A guiding roller 22 is journaled on a cylindrical extension 23 of that arm 14 opposite the one carrying the cutter v20 so that that portion of a disk 5 disposed between the arms and being sharpened is engaged at each side, and the pressure is rendered substantially -uniform by the action of the Springs 17 and 18, the said springs also permitting lateral separation of'thel arms 14 for accommodating irregularities in the contour of several disks. A nut 24 is threaded onto the free end of the cylindrical portion 28 for retaining the roller 22 in place.

Bars 25 are connected with one of the arms 14, at the opposite sides thereof, by a bolt 26. Each bar eXtends longitudinally of the arm and at its free end is formed into or provided with a disk scraper 27 which is shaped and disposed to engage the inner portion of the respective disk 5 for removing dirt or other foreign substances from the disk, the opposite side or outer side of the respective disk being cleaned by the respective scraper 4. That is to say, one of the scrapers 27 acts to scrape the inner surface of the respective disks when the supplemental frame is at one side of the gang of disks, and the other scraper 27 accomplishes this function when the frame is at the opposite side of such gang, as will be hereinafter described, each of the scrapers 27 being disposed in position for being out of the line of the disk when the particular scraper is not in operative relation to the disk. Each arm 25 rests against a washerlike plate 27' which is apertured and surrounds bolt 16 and is engaged by the spring 17, the plate 27 thus resiliently sustaining the arms 25 in their proper positions but allowing movement of the arms upon their pivot under suflicient strain.

The operation which will, it is believed, be obvious from the foregoing, preferably consists, when the supplemental frame 6 is positioned in the rear of the disk, of sliding sleeve 10 to a position opposite the disk to be sharpened, disposing the arms 14 above and across the inner member of the frame 6, and then clamping the sleeve 10 in place by tightening up the set screw 12. VVhen thus p0- sitioned the arms 14 rest upon the inner bar of the frame 6. In this position the cutter edge of bar 20 engages the respective disk 5 at the edge thereof and inwardly for the width of the cutter bar, and immediately at the opposite face of the respective disk 5 the disk is sustained by the engagemcnt of the roller 22 therewith, the said roller being adapted to correspond substantially to the concavity of the respective disk. As the harrow is being drawn across the field, the rotation of the respective disk 5 will cause the edge thereof to be subjected to the sharpening action of the bar 20, slight irregularities in the surface of the disk 5 being accommodated by lateral separation of the arms 14 against the pressure of the Springs 17 and 18, and greater variations of the disk, as for instance when the disk is slightly7 out of true, are accommodatcd by pivotal movement of the arms 14 on their pivots 15. When it is desired to arrange the supplemental frame 6 in front of the gang of disks, the same may be so disposed and supported by a strap or straps connected with some part of the frame of the harrow, the clamping bearings 8 being connected to the shaft 1 in the usual manner, and the operation will be the same except that the arms 14 will be revolved about the supplemental frame by rotary movement of the sleeve 10 so as to bring the arms in position above the supplemental frame and resting on the inner bar thereof so that therengaged disks will extend between the free ends of the arms in the same manner as above described. The cutter bar 20 is also removed and reversed so as to'dispose the Cutting edge thereof in proper relation to the disk.

It is obvious, of course, that the sharpener is applicable to the various types of disk harrows now on the market and may be made to fit different sizes of harrows merely by a Variation in the length of the supplemental frame 6 and of the arms 7.

Having thus described the invention, what is claimed as new is 1. In a disk harrow sharpener, the combination, with a frame, of a sleeve shiftably arms being free to be moved apart pivotally, resilient means tensioned to resist such movement of said arms, and sharpening means carried by the arms in position for engaging the edge of a disk.

2. In a disk harrow sharpener, the combination, with a frame having substantially parallel bars, of a pair of arms pivotally connected to one of the bars and disposed across the frame to rest upon the other bar, the said arms being free to move pivotally for separating laterally, oushioning means resisting the lateral separation, and sharpening means carried by the arms and adapted to engage the edge of a disk.

3. In a disk harrovv sharpener, the combination, with a frame having substantially parallel bars, of a pair of arms pivotally connected to one of the bars and disposed across the frame to rest upon the other bar, the said arms being free to move pivotally for separating laterally, cushioning means resisting the lateral separation, sharpening means carried by the arms and adapted to engage the edge of a disk, and a disk scraper disposed to engage a disk being sharpened, the said scraper being pressed by the said cushioning means thereby being resiliently movable relative to the disk.

4. In a disk sharpener, the combination of a pair of pivotally mounted arms, disk sharpening means carried thereby, said arms being movable laterally apart on `their pivots, a spring, means connected therewith and with the arms for resiliently resisting lateral separation of the arms, and a scraper for a disk being sharpened disposed for being movable relative to the disk against theV tension of the spring.

5. In a disk sharpener, the combination of arms movable laterally apart, disk sharpening means carried by said arms, a spring connected to press the arms toward each other, and a disk scraper pivoted to one of the arms and disposed to be subject to the pressure of said spring.

6. In a disk sharpener, the combination of arms movable laterally apart and adapted to accommodate portions of a harrow disk therebetween, a bolt extending across the arms, disk sharpening means carried by the arms, Springs disposed to engage the bolt and the arms and tensioned to press the arms toward each other, and a scraper pivotally connected to one of the arms and having an engagement relative to one of the Springs for controlling movement of the scraper under spring tension.

7.. In a disk sharpener, the combination of arms movable laterally apart and adapted to accommodate portions of a harrow disk therebetween, a bolt extending across the arms, disk sharpening means carried by the arms, springs disposed to engage the bolt and the arms and tensioned to press the arms toward each other, a plate disposed betweerr one of the arms and outstanding laterally therefrom, and a scraper pivoted to one of the arms and extending past the plate and sustained thereby under spring tension.

8. In a disk sharpener, the combination of arms shiftable laterally apart, disk sharpen ing means carried by the arms, a spring connected to press said arms toward each other, a plate engaged' by the spring and movable subject to the tension thereof, and a disk scraper disposed to engage said plate and move subject to the tension of the spring.

In testimony Whereof I affix my signature in presence of two 'Witnesses HARRY LAMMON.

Witnesses t S. G. CRUsn,

D. HARRELL.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Eatents, Washington, D. 0. 

